Test results show that the hydraulic valve actuation system can realize continuously variable valve lift and the early intake valve closing by changing the time of oil pressure release.

通过实验证明这种液压气门机构可通过改变泄油初始相位角实现进气门最大升程和进气迟闭角的连续可变。

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As the cartel's oil ministers gather in Vienna on September 10th to hammer out new production quotas, they are once again under intense pressure to release more oil, and fast.

九月十日欧佩克各成员国的石油部长们将在维也纳召开会议制定新的生产配额计划，他们将会再次面临尽快增加石油产量的巨大压力。

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Fracking is the process of blasting water at high pressure into shale rock to release oil or gas held within it.

BBC: US oil production 'to jump by a quarter by 2014'

The process involves pumping water containing small percentages of other materials into the porous shale under pressure to hydraulically fracture it and release the trapped oil and gas.

FORBES: Promised Land's Fracking Fictions: OPEC Goes Hollywood With Crocudrama

Fracking uses high-pressure mixtures of water, sand or gravel and chemicals to crack rock formations and release oil and natural gas deep underground.

NPR: Scenic, Struggling S. Illinois Braces For Oil Rush